16 Questions
Who postulated the idea of Parmanu as the smallest particles of matter?
Maharishi Kanad
Who elaborated the doctrine of Parmanu and said that these particles normally exist in a combined form which gives us various forms of matter?
Pakudha Katyayama
During which era did ancient Indian philosophers postulate the idea of Parmanu?
Around 500 BC
Which philosopher suggested that there will be a stage when particles obtained cannot be divided further?
Democritus
Which philosopher suggested the idea of indivisible particles and named them atoms?
Democritus
By the end of which century did scientists recognize the difference between elements and compounds?
18th century
What did Lavoisier establish in the field of chemical sciences?
Two important laws of chemical combination
What is the Law of Conservation of Mass concerned with?
Change in mass during a chemical reaction
According to the Law of Conservation of Mass, what is the mass change during a chemical reaction?
No change in mass
What did Lavoisier and Joseph L. Proust establish about the elements present in compounds?
They are always present in definite proportions by mass
What is another name for the Law of Constant Proportions?
Law of Definite Proportions
Who provided the basic theory about the nature of matter related to the laws established?
John Dalton
What term did John Dalton pick up to describe the basic unit of matter?
'Atoms'
In a compound such as water, what is the ratio of the mass of hydrogen to the mass of oxygen?
1:8
What did Proust state about the presence of elements in a chemical substance?
'Elements are always present in definite proportions by mass'
What did Lavoisier note about many compounds and their composition?
'Each compound had the same elements in the same proportions'
Explore the ancient Indian philosopher Maharishi Kanad's concept of the smallest particles of matter and the idea of divisibility of matter as postulated around 500 BC. Discover the historical perspectives on the unseen form of matter from the chapter on ATOMS.
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